FAIR VALUE MEASUREMENTS - Schedule of assets measured at fair value on a recurring basis (Detail) - USD ($) |
Sep. 30, 2020 |
Dec. 31, 2019 |
|---|---|---|
| Assets: | ||
| Cash and Marketable securities held in Trust Account | $ 828,096,607 | $ 0 |
| Fair Value, Inputs, Level 1 [Member] | ||
| Assets: | ||
| Cash and Marketable securities held in Trust Account | $ 828,096,607 |